Buffer Overflow Vulnerability in Tenda F456 by Tenda
CVE-2026-7100

8.7HIGH

Key Information:

Vendor

Tenda
Status
F456
Vendor
CVE Published:
27 April 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-7100?

A vulnerability exists in the Tenda F456 router's HTTP service, specifically within the fromNatlimitof function in the httpd component. This flaw can be exploited remotely, potentially allowing an attacker to manipulate the affected function and trigger a buffer overflow. Exploitation of this vulnerability could result in unexpected behavior of the Tenda F456 device, which increases security risks. Users are advised to review their security measures and apply any available patches to mitigate this risk.

Affected Version(s)

F456 1.0.0.5

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-7100 - Proof of Concept

References

https://vuldb.com/vuln/359675
vdb-entrytechnical-description
https://vuldb.com/vuln/359675/cti
signaturepermissions-required
https://vuldb.com/submit/798473
third-party-advisory

CVSS V4

Score:
8.7
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

LtzHuster (VulDB User)
.